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September 28, 2014, at 03:03 PM by 121.45.161.42 -
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BETA Band 1 (712- 1015 MHz) observation of the 1 Jy radio galaxy PKS2252-089. The (known) absorption line associated with HI gas intrinsic to PKS2252-089 can clearly be seen at 884 MHz. The inset shows a close-up of the detected absorption line, with the BETA spectrum in red and an earlier GBT observation in blue. [Figure courtesy of CSIRO]\\\
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BETA Band 1 (712- 1015 MHz) observation of the 1 Jy radio galaxy PKS2252-089. The (known) absorption line associated with HI gas intrinsic to PKS2252-089 can clearly be seen at 884 MHz. The inset shows a close-up of the detected absorption line, with the BETA spectrum in red and an earlier GBT observation in blue. [Figure courtesy of CSIRO]\\\

September 28, 2014, at 03:01 PM by 121.45.161.42 -
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BETA Band 1 (712- 1015 MHz) observation of the 1 Jy radio galaxy PKS2252-089. The (known) absorption line associated with HI gas intrinsic to PKS2252-089 can clearly be seen at 884 MHz. The inset shows a close-up of the detected absorption line, with the BETA spectrum in red and an earlier GBT observation in blue. [Figure courtesy of CSIRO]]]
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BETA Band 1 (712- 1015 MHz) observation of the 1 Jy radio galaxy PKS2252-089. The (known) absorption line associated with HI gas intrinsic to PKS2252-089 can clearly be seen at 884 MHz. The inset shows a close-up of the detected absorption line, with the BETA spectrum in red and an earlier GBT observation in blue. [Figure courtesy of CSIRO]\\\
September 28, 2014, at 02:59 PM by 121.45.161.42 -
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[Figure courtesy of CSIRO]
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BETA Band 1 (712- 1015 MHz) observation of the 1 Jy radio galaxy PKS2252-089. The (known) absorption line associated with HI gas intrinsic to PKS2252-089 can clearly be seen at 884 MHz. The inset shows a close-up of the detected absorption line, with the BETA spectrum in red and an earlier GBT observation in blue. [Figure courtesy of CSIRO]]]
September 28, 2014, at 02:54 PM by 121.45.161.42 -
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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.

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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.\\\

September 28, 2014, at 02:53 PM by 121.45.161.42 -
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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.\\\
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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.\\\
September 28, 2014, at 02:52 PM by 121.45.161.42 -
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September 28, 2014, at 02:51 PM by 121.45.161.42 -
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Attach:news_aces.3jpg Δ | [Figure courtesy of CSIRO]

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[Figure courtesy of CSIRO]
September 28, 2014, at 02:49 PM by 121.45.161.42 -
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Attach:news_aces_11072014_full.jpg Δ | 37). [Figure courtesy of CSIRO]

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Attach:news_aces.3jpg Δ | [Figure courtesy of CSIRO]

September 28, 2014, at 02:43 PM by 121.45.161.42 -
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We are currently carrying out a series of demonstration science observations with the BETA test array which links six ASKAP antenas with Mk1 Phased Array Feeds (see here for more details).

Attach:news_aces_11072014_full.jpg Δ | 37). [Figure courtesy of CSIRO]

September 28, 2014, at 02:37 PM by 121.45.161.42 -
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We recently completed the first high-frequency radio survey of the southern sky, the Australia Telescope 20 GHz (AT20G) survey, using a wide-band analogue correlator on the Australia Telescope Compact Array (ATCA). More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

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We recently completed the first high-frequency radio survey of the southern sky, the Australia Telescope 20 GHz (AT20G) survey, using a wide-band analogue correlator on the Australia Telescope Compact Array (ATCA). More details of the survey, as well as the public data catalogue released in 2010, are available here.\\\

September 28, 2014, at 02:36 PM by 121.45.161.42 -
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21cm HI absorption studies with ASKAP

I lead the ASKAP-FLASH survey (see http://www.physics.usyd.edu.au/sifa/Main/FLASH/), which will carry out the first blind survey for HI in individual galaxies at 0.5 < z < 1.0 by detecting the HI line in absorption against background continuum sources.

HI in nearby E/S0 galaxies

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I am also PI for the ASKAP-FLASH survey (see http://www.physics.usyd.edu.au/sifa/Main/FLASH/), which will carry out the first blind survey for HI in individual galaxies at 0.5 < z < 1.0 by detecting the HI line in absorption against background continuum sources.

HI in nearby E/S0 galaxies

February 05, 2010, at 10:04 AM by ElaineSadler -
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I am also PI for the ASKAP-FLASH survey (see below and http://www.physics.usyd.edu.au/sifa/Main/FLASH/), which aims to carry out the first blind survey for HI in individual galaxies at 0.5 < z < 1.0 by detecting the HI line in absorption against background continuum sources.

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I am also PI for the ASKAP-FLASH survey (see http://www.physics.usyd.edu.au/sifa/Main/FLASH/), which will carry out the first blind survey for HI in individual galaxies at 0.5 < z < 1.0 by detecting the HI line in absorption against background continuum sources.

January 15, 2010, at 09:54 PM by ems -
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The Australia Telescope 20 GHz (AT20G) survey

We recently completed the first high-frequency radio survey of the southern sky, using a wide-band analogue correlator on the Australia Telescope Compact Array (ATCA). More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

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The high-frequency radio-source population

We recently completed the first high-frequency radio survey of the southern sky, the Australia Telescope 20 GHz (AT20G) survey, using a wide-band analogue correlator on the Australia Telescope Compact Array (ATCA). More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

January 15, 2010, at 09:50 PM by ems -
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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20 GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

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We recently completed the first high-frequency radio survey of the southern sky, using a wide-band analogue correlator on the Australia Telescope Compact Array (ATCA). More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

January 15, 2010, at 08:28 AM by ems -
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One of the most remarkable astronomical discoveries of the past decade is that the mass of a galaxy and the mass of its central black hole are closely correlated, implying that the growth of a galaxy over cosmic time is closely coupled to the growth of its central black hole.\\\

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One of the most remarkable astronomical discoveries of the past decade is that the mass of a galaxy and the mass of its central black hole are closely correlated, implying that the growth of a galaxy over cosmic time is closely coupled to the growth of its central black hole.

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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby (z=0.009) elliptical galaxy NGC 3250. As with many low-power radio galaxies, the optical spectrum of NGC 3250 shows only stellar absorption lines, with no optical signature of an active nucleus. The total radio luminosity at 1.4 GHz is relatively low (about 10'^22' W/Hz), yet the radio emission shows an edge-brightened (FR-II) morphology which is generally seen only in powerful (> 10'^25' W/Hz) radio galaxies.

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SUMSS contours of 843 MHz radio continuum emission (blue) overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250. As with many low-power radio galaxies, the optical spectrum of NGC 3250 shows only stellar absorption lines, with no optical signature of an active nucleus. The total radio luminosity at 1.4 GHz is relatively low (about 1022 W/Hz), yet the radio emission shows an edge-brightened (FR-II) morphology which is generally seen only in powerful (> 1025 W/Hz) radio galaxies.

Changed lines 26-28 from:

Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.
to:

Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.

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NGC5266 is an E4 elliptical galaxy (green in figure) with a prominent dust lane seen almost edge-on (not visible in the image). Observations with the Australia Telescope Compact Array ATCA showed that it has a disk of neutral hydrogen, perpendicular to the dust lane, extending to almost 10 R_e (red in figure). The estimated HI mass in NGC 5266 is M_HI ~ 2 x 10^10 Mo, a very large amount for an elliptical galaxy (for more details see our paper: Morganti et al. 1997, AJ, 113,937). [Figure courtesy of Raffaella Morganti and Tom Oosterloo, ASTRON]

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NGC5266 is an E4 elliptical galaxy (green in figure) with a prominent dust lane seen almost edge-on (not visible in the image). Observations with the Australia Telescope Compact Array ATCA showed that it has a disk of neutral hydrogen, perpendicular to the dust lane, extending to almost 10 R_e (red in figure). The estimated HI mass in NGC 5266 is M_HI ~ 2 x 1010 solar masses, a very large amount for an elliptical galaxy (for more details see our paper: Morganti et al. 1997, AJ, 113,937). [Figure courtesy of Raffaella Morganti and Tom Oosterloo, ASTRON]

January 15, 2010, at 08:23 AM by ems -
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One of the most remarkable astronomical discoveries of the past decade is that the mass of a galaxy and the mass of its central black hole are closely correlated, implying that the growth of a galaxy over cosmic time is closely coupled to the growth of its central black hole.

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One of the most remarkable astronomical discoveries of the past decade is that the mass of a galaxy and the mass of its central black hole are closely correlated, implying that the growth of a galaxy over cosmic time is closely coupled to the growth of its central black hole.\\\

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Scott Croom and I were recently awarded an ARC DP grant, Relativistic jets and radio-mode feedback in massive galaxies, to investigate the ways in which radio galaxies are triggered and measure the energy input by radio jets into these galaxies at different epochs over cosmic time.

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Scott Croom and I were recently awarded an ARC DP grant, Relativistic jets and radio-mode feedback in massive galaxies, to investigate the ways in which radio galaxies are triggered and measure the energy input by radio jets into these galaxies at different epochs over cosmic time.

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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250.

to:

SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby (z=0.009) elliptical galaxy NGC 3250. As with many low-power radio galaxies, the optical spectrum of NGC 3250 shows only stellar absorption lines, with no optical signature of an active nucleus. The total radio luminosity at 1.4 GHz is relatively low (about 10'^22' W/Hz), yet the radio emission shows an edge-brightened (FR-II) morphology which is generally seen only in powerful (> 10'^25' W/Hz) radio galaxies.

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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20 GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here. \\

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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20 GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here.\\\

January 15, 2010, at 07:55 AM by ems -
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Scott Croom and I were recently awarded an ARC DP grant, Relativistic jets and radio-mode feedback in massive galaxies, to investigate the ways in which radio galaxies are triggered and measure the energy input by radio jets into these galaxies at different epochs over cosmic time.

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Scott Croom and I were recently awarded an ARC DP grant, Relativistic jets and radio-mode feedback in massive galaxies, to investigate the ways in which radio galaxies are triggered and measure the energy input by radio jets into these galaxies at different epochs over cosmic time.

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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS)' sources with a spectral index of α(5, 20) > +0.7.

to:



Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS) sources with a spectral index of α(5, 20) > +0.7.
January 15, 2010, at 07:44 AM by ems -
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Radio colour-colour plot (from Murphy et al. 2010) for a set of 3763 AT20G sources with near-simultaneous observations at 20, 8 and 5 GHz (crosses). Open circles show a newly-identifed class of Ultra-Inverted Spectrum (UIS)' sources with a spectral index of α(5, 20) > +0.7.

January 15, 2010, at 07:33 AM by ems -
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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20\,GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here.

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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20 GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here.

January 14, 2010, at 11:58 AM by ElaineSadler -
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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20\,GHz. More setails of the survey, as well as the public data catalogue released in late 2009, are available here.

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We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20\,GHz. More details of the survey, as well as the public data catalogue released in late 2009, are available here.

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January 14, 2010, at 11:38 AM by ElaineSadler -
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The Australia Telescope 20 GHz (AT20G) survey

We have recently used the Australia Telescope Compact Array (ATCA) make the first high-frequency radio survey of the southern radio continuum at 20\,GHz. More setails of the survey, as well as the public data catalogue released in late 2009, are available here.

January 14, 2010, at 11:27 AM by ElaineSadler -
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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250. This is a somewhat unusual system because the radio emission is extended...

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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250.

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Radio luminosity functions

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Since most E/S0 galaxies We used the HIPASS survey to identify potential

January 07, 2010, at 07:13 PM by ems -
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Massive galaxies, which contain the most massive black holes, provide the most stringent tests of current galaxy formation models. It has been proposed that the energy injected by radio jets in massive galaxies heats the gas in and around the galaxy, preventing it from cooling and forming new stars. This proposed radio-mode feedback (Bower et al. 2006; Croton et al. 2006) provides a natural coupling between the central black hole and the large-scale stellar population of the galaxy.

Scott Croom and I were recently awarded an ARC DP grant, Relativistic jets and radio-mode feedback in massive galaxies, to investigate the ways in which radio galaxies are triggered and measure the energy input by radio jets into these galaxies at different epochs over cosmic time.

January 07, 2010, at 06:59 PM by ems -
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At the centre of every large galaxy is a central supermassive black hole. Enormous amounts of energy can be released when this black hole swallows infalling material, with the energy emerging as radiation from an accretion disk or mechanical power in a radio-emitting jet of particles accelerated to relativistic speeds.

One of the most remarkable astronomical discoveries of the past decade is that the mass of a galaxy and the mass of its central black hole are closely correlated, implying that the growth of a galaxy over cosmic time is closely coupled to the growth of its central black hole.

January 03, 2010, at 12:08 PM by ems -
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something here...

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Radio-loud AGN in 'normal' galaxies

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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250...

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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250. This is a somewhat unusual system because the radio emission is extended...

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January 03, 2010, at 12:06 PM by ems -
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Radio luminosity functions


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something here...

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I have an ongoing research program with Raffaella Morganti and Tom Oosterloo (ASTRON, Netherlands) to investigate the origin and kinematics of neutral hydrogen gas in elliptical and S0 galaxies in the local universe.

I am also PI for the ASKAP-FLASH survey (see below and http://www.physics.usyd.edu.au/sifa/Main/FLASH/), which aims to carry out the first blind survey for HI in individual galaxies at 0.5 < z < 1.0 by detecting the HI line in absorption against background continuum sources.

HI in nearby E/S0 galaxies

Since most E/S0 galaxies We used the HIPASS survey to identify potential

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January 03, 2010, at 11:36 AM by ems -
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'Radio galaxies and their evolution

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Radio galaxies and their evolution

January 03, 2010, at 11:36 AM by ems -
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Radio galaxies and their evolution

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'Radio galaxies and their evolution

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Neutral hydrogen in the universe

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Neutral hydrogen in the universe

January 03, 2010, at 11:35 AM by ems -
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SUMSS contours (blue) of 843 MHz radio continuum emission overlaid on a greyscale image of the nearby elliptical galaxy NGC 3250...

January 03, 2010, at 11:28 AM by ems -
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NGC5266 is an E4 elliptical galaxy (green in figure) with a prominent dust lane seen almost edge-on (not visible in the image). Observations with ATCA show that it has a disk of neutral hydrogen, perpendicular to the dust lane, extending to almost 10 R_e (red in figure). The estimated HI mass in NGC 5266 is M_HI ~ 2 x 10^10 Mo, a very large amount for an elliptical galaxy (for more details see our paper: Morganti et al. 1997, AJ, 113,937). [Figure courtesy of Raffaella Morganti and Tom Oosterloo, ASTRON]

to:

NGC5266 is an E4 elliptical galaxy (green in figure) with a prominent dust lane seen almost edge-on (not visible in the image). Observations with the Australia Telescope Compact Array ATCA showed that it has a disk of neutral hydrogen, perpendicular to the dust lane, extending to almost 10 R_e (red in figure). The estimated HI mass in NGC 5266 is M_HI ~ 2 x 10^10 Mo, a very large amount for an elliptical galaxy (for more details see our paper: Morganti et al. 1997, AJ, 113,937). [Figure courtesy of Raffaella Morganti and Tom Oosterloo, ASTRON]

January 03, 2010, at 11:22 AM by ems -
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NGC5266 is an E4 elliptical galaxy (green in figure) with a prominent dust lane seen almost edge-on (not visible in the image). Observations with ATCA show that it has a disk of neutral hydrogen, perpendicular to the dust lane, extending to almost 10 R_e (red in figure). The estimated HI mass in NGC 5266 is M_HI ~ 2 x 10^10 Mo, a very large amount for an elliptical galaxy (for more details see our paper: Morganti et al. 1997, AJ, 113,937). [Figure courtesy of Raffaella Morganti and Tom Oosterloo, ASTRON]

January 03, 2010, at 11:18 AM by ems -
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something here...

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something here...

January 03, 2010, at 11:08 AM by ems -
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I'm going to add something here...

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Radio galaxies and their evolution

something here...

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Neutral hydrogen in the universe

something here...

January 03, 2010, at 09:00 AM by ems -
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Welcome to my home page, I'm an ARC Australian Professorial Fellow (and Professor of Astrophysics) in the School of Physics at the University of Sydney. I work within the Sydney Institute for Astronomy (SIfA).

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I'm going to add something here...

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December 16, 2009, at 07:13 AM by ems -
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Welcome to my home page, I'm an ARC Australian Professorial Fellow (and Professor of Astrophysics) in the School of Physics at the University of Sydney. I work within the Sydney Institute for Astronomy (SIfA).

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Welcome to my home page, I'm an ARC Australian Professorial Fellow (and Professor of Astrophysics) in the School of Physics at the University of Sydney. I work within the Sydney Institute for Astronomy (SIfA).

December 15, 2009, at 11:24 PM by ems -
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December 15, 2009, at 10:15 PM by ems -
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December 15, 2009, at 10:12 PM by ems -
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December 15, 2009, at 10:12 PM by ems -
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Welcome to my home page, I'm an ARC Australian Professorial Fellow (and Professor of Astrophysics) in the School of Physics at the University of Sydney. I work within the Sydney Institute for Astronomy (SIfA).